Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
ecd75fc8 | 3 | Copyright (C) 1988-2014 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "frame.h" | |
22 | #include "inferior.h" | |
23 | #include "target.h" | |
24 | #include "gdbcmd.h" | |
25 | #include "language.h" | |
0ba1096a | 26 | #include "filenames.h" |
c906108c SS |
27 | #include "symfile.h" |
28 | #include "objfiles.h" | |
c5f0f3d0 | 29 | #include "completer.h" |
fd0407d6 | 30 | #include "value.h" |
4646aa9d | 31 | #include "exec.h" |
ea53e89f | 32 | #include "observer.h" |
dacec2a8 | 33 | #include "arch-utils.h" |
6c95b8df PA |
34 | #include "gdbthread.h" |
35 | #include "progspace.h" | |
cbb099e8 | 36 | #include "gdb_bfd.h" |
b427c1bc | 37 | #include "gcore.h" |
c906108c | 38 | |
c906108c | 39 | #include <fcntl.h> |
dbda9972 | 40 | #include "readline/readline.h" |
0e9f083f | 41 | #include <string.h> |
c906108c SS |
42 | |
43 | #include "gdbcore.h" | |
44 | ||
45 | #include <ctype.h> | |
53ce3c39 | 46 | #include <sys/stat.h> |
c906108c | 47 | |
9a4105ab | 48 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
49 | |
50 | /* Prototypes for local functions */ | |
51 | ||
a14ed312 | 52 | static void file_command (char *, int); |
c906108c | 53 | |
a14ed312 | 54 | static void set_section_command (char *, int); |
c906108c | 55 | |
a14ed312 | 56 | static void exec_files_info (struct target_ops *); |
c906108c | 57 | |
a14ed312 | 58 | static void init_exec_ops (void); |
c906108c | 59 | |
a14ed312 | 60 | void _initialize_exec (void); |
c906108c | 61 | |
c906108c SS |
62 | /* The target vector for executable files. */ |
63 | ||
64 | struct target_ops exec_ops; | |
65 | ||
6c95b8df PA |
66 | /* True if the exec target is pushed on the stack. */ |
67 | static int using_exec_ops; | |
07b82ea5 | 68 | |
c906108c SS |
69 | /* Whether to open exec and core files read-only or read-write. */ |
70 | ||
71 | int write_files = 0; | |
920d2a44 AC |
72 | static void |
73 | show_write_files (struct ui_file *file, int from_tty, | |
74 | struct cmd_list_element *c, const char *value) | |
75 | { | |
76 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
77 | value); | |
78 | } | |
79 | ||
c906108c | 80 | |
4c42eaff | 81 | static void |
1adeb98a FN |
82 | exec_open (char *args, int from_tty) |
83 | { | |
84 | target_preopen (from_tty); | |
85 | exec_file_attach (args, from_tty); | |
86 | } | |
87 | ||
07b82ea5 PA |
88 | /* Close and clear exec_bfd. If we end up with no target sections to |
89 | read memory from, this unpushes the exec_ops target. */ | |
90 | ||
6c95b8df PA |
91 | void |
92 | exec_close (void) | |
07b82ea5 PA |
93 | { |
94 | if (exec_bfd) | |
95 | { | |
96 | bfd *abfd = exec_bfd; | |
07b82ea5 | 97 | |
cbb099e8 | 98 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
99 | |
100 | /* Removing target sections may close the exec_ops target. | |
101 | Clear exec_bfd before doing so to prevent recursion. */ | |
102 | exec_bfd = NULL; | |
103 | exec_bfd_mtime = 0; | |
104 | ||
046ac79f | 105 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
106 | |
107 | xfree (exec_filename); | |
108 | exec_filename = NULL; | |
07b82ea5 PA |
109 | } |
110 | } | |
111 | ||
6c95b8df PA |
112 | /* This is the target_close implementation. Clears all target |
113 | sections and closes all executable bfds from all program spaces. */ | |
114 | ||
c906108c | 115 | static void |
de90e03d | 116 | exec_close_1 (struct target_ops *self) |
c906108c | 117 | { |
6c95b8df PA |
118 | using_exec_ops = 0; |
119 | ||
6c95b8df PA |
120 | { |
121 | struct program_space *ss; | |
122 | struct cleanup *old_chain; | |
c906108c | 123 | |
6c95b8df PA |
124 | old_chain = save_current_program_space (); |
125 | ALL_PSPACES (ss) | |
126 | { | |
127 | set_current_program_space (ss); | |
128 | ||
129 | /* Delete all target sections. */ | |
130 | resize_section_table | |
131 | (current_target_sections, | |
132 | -resize_section_table (current_target_sections, 0)); | |
133 | ||
134 | exec_close (); | |
135 | } | |
136 | ||
137 | do_cleanups (old_chain); | |
138 | } | |
c906108c SS |
139 | } |
140 | ||
1adeb98a FN |
141 | void |
142 | exec_file_clear (int from_tty) | |
143 | { | |
144 | /* Remove exec file. */ | |
6c95b8df | 145 | exec_close (); |
1adeb98a FN |
146 | |
147 | if (from_tty) | |
a3f17187 | 148 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
149 | } |
150 | ||
907083d1 | 151 | /* Set FILENAME as the new exec file. |
c906108c | 152 | |
c5aa993b JM |
153 | This function is intended to be behave essentially the same |
154 | as exec_file_command, except that the latter will detect when | |
155 | a target is being debugged, and will ask the user whether it | |
156 | should be shut down first. (If the answer is "no", then the | |
157 | new file is ignored.) | |
c906108c | 158 | |
c5aa993b JM |
159 | This file is used by exec_file_command, to do the work of opening |
160 | and processing the exec file after any prompting has happened. | |
c906108c | 161 | |
c5aa993b JM |
162 | And, it is used by child_attach, when the attach command was |
163 | given a pid but not a exec pathname, and the attach command could | |
164 | figure out the pathname from the pid. (In this case, we shouldn't | |
165 | ask the user whether the current target should be shut down -- | |
907083d1 | 166 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
167 | |
168 | void | |
1adeb98a | 169 | exec_file_attach (char *filename, int from_tty) |
c906108c | 170 | { |
c906108c | 171 | /* Remove any previous exec file. */ |
6c95b8df | 172 | exec_close (); |
c906108c SS |
173 | |
174 | /* Now open and digest the file the user requested, if any. */ | |
175 | ||
1adeb98a FN |
176 | if (!filename) |
177 | { | |
178 | if (from_tty) | |
a3f17187 | 179 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
180 | |
181 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
182 | } |
183 | else | |
c906108c | 184 | { |
f7545552 | 185 | struct cleanup *cleanups; |
1f0c4988 | 186 | char *scratch_pathname, *canonical_pathname; |
c906108c | 187 | int scratch_chan; |
07b82ea5 | 188 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 189 | char **matching; |
c5aa993b | 190 | |
492c0ab7 | 191 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 192 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 193 | &scratch_pathname); |
cfc3008e | 194 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 195 | if (scratch_chan < 0) |
c5aa993b JM |
196 | { |
197 | char *exename = alloca (strlen (filename) + 5); | |
d7f9d729 | 198 | |
c5aa993b | 199 | strcat (strcpy (exename, filename), ".exe"); |
492c0ab7 | 200 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 201 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 202 | &scratch_pathname); |
c5aa993b | 203 | } |
c906108c | 204 | #endif |
17d6efc4 JB |
205 | if (scratch_chan < 0) |
206 | perror_with_name (filename); | |
a4453b7e TT |
207 | |
208 | cleanups = make_cleanup (xfree, scratch_pathname); | |
209 | ||
1f0c4988 JK |
210 | /* gdb_bfd_open (and its variants) prefers canonicalized pathname for |
211 | better BFD caching. */ | |
212 | canonical_pathname = gdb_realpath (scratch_pathname); | |
213 | make_cleanup (xfree, canonical_pathname); | |
214 | ||
1c00ec6b | 215 | if (write_files) |
1f0c4988 | 216 | exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget, |
1c00ec6b TT |
217 | FOPEN_RUB, scratch_chan); |
218 | else | |
1f0c4988 | 219 | exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
c906108c SS |
220 | |
221 | if (!exec_bfd) | |
9fe4a216 | 222 | { |
9fe4a216 TT |
223 | error (_("\"%s\": could not open as an executable file: %s"), |
224 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
225 | } | |
c906108c | 226 | |
1f0c4988 | 227 | gdb_assert (exec_filename == NULL); |
4856b6bc | 228 | exec_filename = gdb_realpath_keepfile (scratch_pathname); |
1f0c4988 | 229 | |
d18b8b7a | 230 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
231 | { |
232 | /* Make sure to close exec_bfd, or else "run" might try to use | |
233 | it. */ | |
6c95b8df | 234 | exec_close (); |
8a3fe4f8 | 235 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
236 | scratch_pathname, |
237 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
238 | } |
239 | ||
07b82ea5 | 240 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
241 | { |
242 | /* Make sure to close exec_bfd, or else "run" might try to use | |
243 | it. */ | |
6c95b8df | 244 | exec_close (); |
8a3fe4f8 | 245 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
246 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
247 | } | |
248 | ||
c04ea773 DJ |
249 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
250 | ||
c906108c SS |
251 | validate_files (); |
252 | ||
253 | set_gdbarch_from_file (exec_bfd); | |
254 | ||
07b82ea5 | 255 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
256 | list of sections. This possibly pushes the exec_ops |
257 | target. */ | |
ed9eebaf | 258 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 259 | xfree (sections); |
c906108c SS |
260 | |
261 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
262 | if (deprecated_exec_file_display_hook) |
263 | (*deprecated_exec_file_display_hook) (filename); | |
f7545552 TT |
264 | |
265 | do_cleanups (cleanups); | |
c906108c | 266 | } |
ce7d4522 | 267 | bfd_cache_close_all (); |
781b42b0 | 268 | observer_notify_executable_changed (); |
c906108c SS |
269 | } |
270 | ||
271 | /* Process the first arg in ARGS as the new exec file. | |
272 | ||
c5aa993b JM |
273 | Note that we have to explicitly ignore additional args, since we can |
274 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
275 | which can take multiple args. |
276 | ||
0963b4bd | 277 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 278 | |
1adeb98a | 279 | static void |
fba45db2 | 280 | exec_file_command (char *args, int from_tty) |
c906108c | 281 | { |
1adeb98a FN |
282 | char **argv; |
283 | char *filename; | |
4c42eaff DJ |
284 | |
285 | if (from_tty && target_has_execution | |
286 | && !query (_("A program is being debugged already.\n" | |
287 | "Are you sure you want to change the file? "))) | |
288 | error (_("File not changed.")); | |
1adeb98a FN |
289 | |
290 | if (args) | |
291 | { | |
f7545552 TT |
292 | struct cleanup *cleanups; |
293 | ||
1adeb98a FN |
294 | /* Scan through the args and pick up the first non option arg |
295 | as the filename. */ | |
296 | ||
d1a41061 | 297 | argv = gdb_buildargv (args); |
f7545552 | 298 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
299 | |
300 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
301 | {; | |
302 | } | |
303 | if (*argv == NULL) | |
8a3fe4f8 | 304 | error (_("No executable file name was specified")); |
1adeb98a FN |
305 | |
306 | filename = tilde_expand (*argv); | |
307 | make_cleanup (xfree, filename); | |
308 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
309 | |
310 | do_cleanups (cleanups); | |
1adeb98a FN |
311 | } |
312 | else | |
313 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
314 | } |
315 | ||
0963b4bd | 316 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
317 | What a novelty. Why did GDB go through four major releases before this |
318 | command was added? */ | |
319 | ||
320 | static void | |
fba45db2 | 321 | file_command (char *arg, int from_tty) |
c906108c SS |
322 | { |
323 | /* FIXME, if we lose on reading the symbol file, we should revert | |
324 | the exec file, but that's rough. */ | |
325 | exec_file_command (arg, from_tty); | |
326 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
327 | if (deprecated_file_changed_hook) |
328 | deprecated_file_changed_hook (arg); | |
c906108c | 329 | } |
c906108c | 330 | \f |
c5aa993b | 331 | |
0963b4bd | 332 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
333 | table_pp_char is a char * to get it through bfd_map_over_sections; |
334 | we cast it back to its proper type. */ | |
335 | ||
336 | static void | |
7be0c536 AC |
337 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
338 | void *table_pp_char) | |
c906108c | 339 | { |
0542c86d | 340 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
341 | flagword aflag; |
342 | ||
2b2848e2 DE |
343 | gdb_assert (abfd == asect->owner); |
344 | ||
0f5d55d8 JB |
345 | /* Check the section flags, but do not discard zero-length sections, since |
346 | some symbols may still be attached to this section. For instance, we | |
347 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
348 | section to which a symbol named "_end" was attached. The address | |
349 | of this symbol still needs to be relocated. */ | |
c906108c SS |
350 | aflag = bfd_get_section_flags (abfd, asect); |
351 | if (!(aflag & SEC_ALLOC)) | |
352 | return; | |
0f5d55d8 | 353 | |
046ac79f | 354 | (*table_pp)->owner = NULL; |
c906108c SS |
355 | (*table_pp)->the_bfd_section = asect; |
356 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
357 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
358 | (*table_pp)++; | |
359 | } | |
360 | ||
07b82ea5 PA |
361 | int |
362 | resize_section_table (struct target_section_table *table, int num_added) | |
363 | { | |
07b82ea5 PA |
364 | int old_count; |
365 | int new_count; | |
366 | ||
07b82ea5 PA |
367 | old_count = table->sections_end - table->sections; |
368 | ||
369 | new_count = num_added + old_count; | |
370 | ||
371 | if (new_count) | |
372 | { | |
373 | table->sections = xrealloc (table->sections, | |
374 | sizeof (struct target_section) * new_count); | |
375 | table->sections_end = table->sections + new_count; | |
376 | } | |
377 | else | |
378 | { | |
379 | xfree (table->sections); | |
380 | table->sections = table->sections_end = NULL; | |
381 | } | |
382 | ||
383 | return old_count; | |
384 | } | |
385 | ||
c906108c SS |
386 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
387 | Returns 0 if OK, 1 on error. */ | |
388 | ||
389 | int | |
0542c86d PA |
390 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
391 | struct target_section **end) | |
c906108c SS |
392 | { |
393 | unsigned count; | |
394 | ||
395 | count = bfd_count_sections (some_bfd); | |
396 | if (*start) | |
b8c9b27d | 397 | xfree (* start); |
0542c86d | 398 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 399 | *end = *start; |
c5aa993b | 400 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 401 | if (*end > *start + count) |
3e43a32a MS |
402 | internal_error (__FILE__, __LINE__, |
403 | _("failed internal consistency check")); | |
c906108c SS |
404 | /* We could realloc the table, but it probably loses for most files. */ |
405 | return 0; | |
406 | } | |
07b82ea5 PA |
407 | |
408 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
409 | current set of target sections. */ | |
410 | ||
411 | void | |
046ac79f | 412 | add_target_sections (void *owner, |
ed9eebaf | 413 | struct target_section *sections, |
07b82ea5 PA |
414 | struct target_section *sections_end) |
415 | { | |
416 | int count; | |
417 | struct target_section_table *table = current_target_sections; | |
418 | ||
419 | count = sections_end - sections; | |
420 | ||
421 | if (count > 0) | |
422 | { | |
423 | int space = resize_section_table (table, count); | |
ed9eebaf | 424 | int i; |
d7f9d729 | 425 | |
ed9eebaf TT |
426 | for (i = 0; i < count; ++i) |
427 | { | |
428 | table->sections[space + i] = sections[i]; | |
046ac79f | 429 | table->sections[space + i].owner = owner; |
ed9eebaf | 430 | } |
07b82ea5 PA |
431 | |
432 | /* If these are the first file sections we can provide memory | |
433 | from, push the file_stratum target. */ | |
6c95b8df PA |
434 | if (!using_exec_ops) |
435 | { | |
436 | using_exec_ops = 1; | |
437 | push_target (&exec_ops); | |
438 | } | |
07b82ea5 PA |
439 | } |
440 | } | |
441 | ||
76ad5e1e NB |
442 | /* Add the sections of OBJFILE to the current set of target sections. */ |
443 | ||
444 | void | |
445 | add_target_sections_of_objfile (struct objfile *objfile) | |
446 | { | |
447 | struct target_section_table *table = current_target_sections; | |
448 | struct obj_section *osect; | |
449 | int space; | |
450 | unsigned count = 0; | |
451 | struct target_section *ts; | |
452 | ||
453 | if (objfile == NULL) | |
454 | return; | |
455 | ||
456 | /* Compute the number of sections to add. */ | |
457 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
458 | { | |
459 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
460 | continue; | |
461 | count++; | |
462 | } | |
463 | ||
464 | if (count == 0) | |
465 | return; | |
466 | ||
467 | space = resize_section_table (table, count); | |
468 | ||
469 | ts = table->sections + space; | |
470 | ||
471 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
472 | { | |
473 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
474 | continue; | |
475 | ||
476 | gdb_assert (ts < table->sections + space + count); | |
477 | ||
478 | ts->addr = obj_section_addr (osect); | |
479 | ts->endaddr = obj_section_endaddr (osect); | |
480 | ts->the_bfd_section = osect->the_bfd_section; | |
481 | ts->owner = (void *) objfile; | |
482 | ||
483 | ts++; | |
484 | } | |
485 | } | |
486 | ||
046ac79f JK |
487 | /* Remove all target sections owned by OWNER. |
488 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
489 | |
490 | void | |
046ac79f | 491 | remove_target_sections (void *owner) |
07b82ea5 PA |
492 | { |
493 | struct target_section *src, *dest; | |
07b82ea5 PA |
494 | struct target_section_table *table = current_target_sections; |
495 | ||
046ac79f JK |
496 | gdb_assert (owner != NULL); |
497 | ||
07b82ea5 PA |
498 | dest = table->sections; |
499 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 500 | if (src->owner != owner) |
07b82ea5 PA |
501 | { |
502 | /* Keep this section. */ | |
503 | if (dest < src) | |
504 | *dest = *src; | |
505 | dest++; | |
506 | } | |
507 | ||
508 | /* If we've dropped any sections, resize the section table. */ | |
509 | if (dest < src) | |
510 | { | |
511 | int old_count; | |
512 | ||
513 | old_count = resize_section_table (table, dest - src); | |
514 | ||
515 | /* If we don't have any more sections to read memory from, | |
516 | remove the file_stratum target from the stack. */ | |
517 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
518 | { |
519 | struct program_space *pspace; | |
520 | ||
521 | ALL_PSPACES (pspace) | |
522 | if (pspace->target_sections.sections | |
523 | != pspace->target_sections.sections_end) | |
524 | return; | |
525 | ||
526 | unpush_target (&exec_ops); | |
527 | } | |
07b82ea5 PA |
528 | } |
529 | } | |
530 | ||
c906108c | 531 | \f |
348f8c02 | 532 | |
e6ca34fc PA |
533 | VEC(mem_range_s) * |
534 | section_table_available_memory (VEC(mem_range_s) *memory, | |
424447ee | 535 | CORE_ADDR memaddr, ULONGEST len, |
e6ca34fc PA |
536 | struct target_section *sections, |
537 | struct target_section *sections_end) | |
538 | { | |
539 | struct target_section *p; | |
e6ca34fc PA |
540 | |
541 | for (p = sections; p < sections_end; p++) | |
542 | { | |
2b2848e2 DE |
543 | if ((bfd_get_section_flags (p->the_bfd_section->owner, |
544 | p->the_bfd_section) | |
e6ca34fc PA |
545 | & SEC_READONLY) == 0) |
546 | continue; | |
547 | ||
548 | /* Copy the meta-data, adjusted. */ | |
549 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
550 | { | |
551 | ULONGEST lo1, hi1, lo2, hi2; | |
552 | struct mem_range *r; | |
553 | ||
554 | lo1 = memaddr; | |
555 | hi1 = memaddr + len; | |
556 | ||
557 | lo2 = p->addr; | |
558 | hi2 = p->endaddr; | |
559 | ||
560 | r = VEC_safe_push (mem_range_s, memory, NULL); | |
561 | ||
562 | r->start = max (lo1, lo2); | |
563 | r->length = min (hi1, hi2) - r->start; | |
564 | } | |
565 | } | |
566 | ||
567 | return memory; | |
568 | } | |
569 | ||
9b409511 | 570 | enum target_xfer_status |
07b82ea5 | 571 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 572 | ULONGEST offset, ULONGEST len, |
9b409511 | 573 | ULONGEST *xfered_len, |
07b82ea5 PA |
574 | struct target_section *sections, |
575 | struct target_section *sections_end, | |
576 | const char *section_name) | |
c906108c | 577 | { |
020cc13c | 578 | int res; |
0542c86d | 579 | struct target_section *p; |
07b82ea5 PA |
580 | ULONGEST memaddr = offset; |
581 | ULONGEST memend = memaddr + len; | |
c906108c | 582 | |
b55e14c7 | 583 | if (len == 0) |
3e43a32a MS |
584 | internal_error (__FILE__, __LINE__, |
585 | _("failed internal consistency check")); | |
c906108c | 586 | |
348f8c02 | 587 | for (p = sections; p < sections_end; p++) |
c906108c | 588 | { |
2b2848e2 DE |
589 | struct bfd_section *asect = p->the_bfd_section; |
590 | bfd *abfd = asect->owner; | |
591 | ||
592 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 593 | continue; /* not the section we need. */ |
c906108c | 594 | if (memaddr >= p->addr) |
3db26b01 JB |
595 | { |
596 | if (memend <= p->endaddr) | |
597 | { | |
598 | /* Entire transfer is within this section. */ | |
07b82ea5 | 599 | if (writebuf) |
2b2848e2 | 600 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 601 | writebuf, memaddr - p->addr, |
85302095 AC |
602 | len); |
603 | else | |
2b2848e2 | 604 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 605 | readbuf, memaddr - p->addr, |
85302095 | 606 | len); |
9b409511 YQ |
607 | |
608 | if (res != 0) | |
609 | { | |
610 | *xfered_len = len; | |
611 | return TARGET_XFER_OK; | |
612 | } | |
613 | else | |
614 | return TARGET_XFER_EOF; | |
3db26b01 JB |
615 | } |
616 | else if (memaddr >= p->endaddr) | |
617 | { | |
618 | /* This section ends before the transfer starts. */ | |
619 | continue; | |
620 | } | |
621 | else | |
622 | { | |
623 | /* This section overlaps the transfer. Just do half. */ | |
624 | len = p->endaddr - memaddr; | |
07b82ea5 | 625 | if (writebuf) |
2b2848e2 | 626 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 627 | writebuf, memaddr - p->addr, |
85302095 AC |
628 | len); |
629 | else | |
2b2848e2 | 630 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 631 | readbuf, memaddr - p->addr, |
85302095 | 632 | len); |
9b409511 YQ |
633 | if (res != 0) |
634 | { | |
635 | *xfered_len = len; | |
636 | return TARGET_XFER_OK; | |
637 | } | |
638 | else | |
639 | return TARGET_XFER_EOF; | |
3db26b01 JB |
640 | } |
641 | } | |
c906108c SS |
642 | } |
643 | ||
9b409511 | 644 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 645 | } |
348f8c02 | 646 | |
70221824 | 647 | static struct target_section_table * |
07b82ea5 | 648 | exec_get_section_table (struct target_ops *ops) |
348f8c02 | 649 | { |
07b82ea5 | 650 | return current_target_sections; |
348f8c02 PA |
651 | } |
652 | ||
9b409511 | 653 | static enum target_xfer_status |
07b82ea5 PA |
654 | exec_xfer_partial (struct target_ops *ops, enum target_object object, |
655 | const char *annex, gdb_byte *readbuf, | |
656 | const gdb_byte *writebuf, | |
9b409511 | 657 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
348f8c02 | 658 | { |
07b82ea5 PA |
659 | struct target_section_table *table = target_get_section_table (ops); |
660 | ||
661 | if (object == TARGET_OBJECT_MEMORY) | |
662 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 663 | offset, len, xfered_len, |
07b82ea5 PA |
664 | table->sections, |
665 | table->sections_end, | |
666 | NULL); | |
667 | else | |
2ed4b548 | 668 | return TARGET_XFER_E_IO; |
348f8c02 | 669 | } |
c906108c | 670 | \f |
c5aa993b | 671 | |
c906108c | 672 | void |
07b82ea5 | 673 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 674 | { |
5af949e3 | 675 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 676 | struct target_section *p; |
17a912b6 | 677 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 678 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 679 | |
c5aa993b | 680 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 681 | wrap_here (" "); |
a3f17187 | 682 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 683 | if (abfd == exec_bfd) |
51bee8e9 | 684 | { |
3e43a32a MS |
685 | /* gcc-3.4 does not like the initialization in |
686 | <p == t->sections_end>. */ | |
d904de5b | 687 | bfd_vma displacement = 0; |
2f1bdd26 | 688 | bfd_vma entry_point; |
51bee8e9 JK |
689 | |
690 | for (p = t->sections; p < t->sections_end; p++) | |
691 | { | |
2b2848e2 DE |
692 | struct bfd_section *psect = p->the_bfd_section; |
693 | bfd *pbfd = psect->owner; | |
51bee8e9 | 694 | |
2b2848e2 | 695 | if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
696 | != (SEC_ALLOC | SEC_LOAD)) |
697 | continue; | |
698 | ||
2b2848e2 DE |
699 | if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address |
700 | && abfd->start_address < (bfd_get_section_vma (pbfd, psect) | |
701 | + bfd_get_section_size (psect))) | |
51bee8e9 | 702 | { |
2b2848e2 | 703 | displacement = p->addr - bfd_get_section_vma (pbfd, psect); |
51bee8e9 JK |
704 | break; |
705 | } | |
706 | } | |
707 | if (p == t->sections_end) | |
b37520b6 | 708 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 709 | bfd_get_filename (abfd)); |
51bee8e9 | 710 | |
2f1bdd26 MGD |
711 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
712 | bfd_get_start_address (abfd) | |
713 | + displacement); | |
51bee8e9 | 714 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 715 | paddress (gdbarch, entry_point)); |
51bee8e9 | 716 | } |
07b82ea5 | 717 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 718 | { |
2b2848e2 DE |
719 | struct bfd_section *psect = p->the_bfd_section; |
720 | bfd *pbfd = psect->owner; | |
721 | ||
bb599908 PH |
722 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
723 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
724 | |
725 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
726 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
727 | since most output will then be much wider than necessary. It | |
728 | may make sense to test the size of the file and choose the | |
729 | format string accordingly. */ | |
a3f17187 | 730 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
731 | if (info_verbose) |
732 | printf_filtered (" @ %s", | |
2b2848e2 DE |
733 | hex_string_custom (psect->filepos, 8)); |
734 | printf_filtered (" is %s", bfd_section_name (pbfd, psect)); | |
735 | if (pbfd != abfd) | |
736 | printf_filtered (" in %s", bfd_get_filename (pbfd)); | |
c906108c SS |
737 | printf_filtered ("\n"); |
738 | } | |
739 | } | |
740 | ||
741 | static void | |
fba45db2 | 742 | exec_files_info (struct target_ops *t) |
c906108c | 743 | { |
57008375 JK |
744 | if (exec_bfd) |
745 | print_section_info (current_target_sections, exec_bfd); | |
746 | else | |
747 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
748 | } |
749 | ||
750 | static void | |
fba45db2 | 751 | set_section_command (char *args, int from_tty) |
c906108c | 752 | { |
0542c86d | 753 | struct target_section *p; |
c906108c SS |
754 | char *secname; |
755 | unsigned seclen; | |
756 | unsigned long secaddr; | |
757 | char secprint[100]; | |
758 | long offset; | |
07b82ea5 | 759 | struct target_section_table *table; |
c906108c SS |
760 | |
761 | if (args == 0) | |
8a3fe4f8 | 762 | error (_("Must specify section name and its virtual address")); |
c906108c | 763 | |
0963b4bd | 764 | /* Parse out section name. */ |
c5aa993b | 765 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
766 | seclen = args - secname; |
767 | ||
0963b4bd | 768 | /* Parse out new virtual address. */ |
c906108c SS |
769 | secaddr = parse_and_eval_address (args); |
770 | ||
07b82ea5 PA |
771 | table = current_target_sections; |
772 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 773 | { |
57008375 | 774 | if (!strncmp (secname, bfd_section_name (p->bfd, |
3e43a32a | 775 | p->the_bfd_section), seclen) |
57008375 | 776 | && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0') |
c5aa993b JM |
777 | { |
778 | offset = secaddr - p->addr; | |
779 | p->addr += offset; | |
780 | p->endaddr += offset; | |
781 | if (from_tty) | |
782 | exec_files_info (&exec_ops); | |
783 | return; | |
784 | } | |
c906108c | 785 | } |
c906108c SS |
786 | if (seclen >= sizeof (secprint)) |
787 | seclen = sizeof (secprint) - 1; | |
788 | strncpy (secprint, secname, seclen); | |
789 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 790 | error (_("Section %s not found"), secprint); |
c906108c SS |
791 | } |
792 | ||
30510692 DJ |
793 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
794 | it to ADDRESS. */ | |
c1bd25fd DJ |
795 | |
796 | void | |
797 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
798 | { | |
0542c86d | 799 | struct target_section *p; |
07b82ea5 | 800 | struct target_section_table *table; |
c1bd25fd | 801 | |
07b82ea5 PA |
802 | table = current_target_sections; |
803 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 804 | { |
2b2848e2 | 805 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 806 | && index == p->the_bfd_section->index) |
c1bd25fd | 807 | { |
30510692 | 808 | p->endaddr += address - p->addr; |
c1bd25fd | 809 | p->addr = address; |
c1bd25fd DJ |
810 | } |
811 | } | |
812 | } | |
813 | ||
c906108c SS |
814 | /* If mourn is being called in all the right places, this could be say |
815 | `gdb internal error' (since generic_mourn calls | |
816 | breakpoint_init_inferior). */ | |
817 | ||
818 | static int | |
3db08215 MM |
819 | ignore (struct target_ops *ops, struct gdbarch *gdbarch, |
820 | struct bp_target_info *bp_tgt) | |
c906108c SS |
821 | { |
822 | return 0; | |
823 | } | |
824 | ||
c35b1492 PA |
825 | static int |
826 | exec_has_memory (struct target_ops *ops) | |
827 | { | |
828 | /* We can provide memory if we have any file/target sections to read | |
829 | from. */ | |
830 | return (current_target_sections->sections | |
831 | != current_target_sections->sections_end); | |
832 | } | |
833 | ||
fc6691b2 | 834 | static char *exec_make_note_section (struct target_ops *self, bfd *, int *); |
be4d1333 | 835 | |
c906108c SS |
836 | /* Fill in the exec file target vector. Very few entries need to be |
837 | defined. */ | |
838 | ||
be4d1333 | 839 | static void |
fba45db2 | 840 | init_exec_ops (void) |
c906108c SS |
841 | { |
842 | exec_ops.to_shortname = "exec"; | |
843 | exec_ops.to_longname = "Local exec file"; | |
844 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
845 | Specify the filename of the executable file."; | |
1adeb98a | 846 | exec_ops.to_open = exec_open; |
6c95b8df | 847 | exec_ops.to_close = exec_close_1; |
c906108c | 848 | exec_ops.to_attach = find_default_attach; |
07b82ea5 PA |
849 | exec_ops.to_xfer_partial = exec_xfer_partial; |
850 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
851 | exec_ops.to_files_info = exec_files_info; |
852 | exec_ops.to_insert_breakpoint = ignore; | |
853 | exec_ops.to_remove_breakpoint = ignore; | |
854 | exec_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 855 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 856 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 857 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
b427c1bc | 858 | exec_ops.to_find_memory_regions = objfile_find_memory_regions; |
c5aa993b | 859 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
860 | } |
861 | ||
862 | void | |
fba45db2 | 863 | _initialize_exec (void) |
c906108c SS |
864 | { |
865 | struct cmd_list_element *c; | |
866 | ||
867 | init_exec_ops (); | |
868 | ||
869 | if (!dbx_commands) | |
870 | { | |
1a966eab AC |
871 | c = add_cmd ("file", class_files, file_command, _("\ |
872 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
873 | It is read for its symbols, for getting the contents of pure memory,\n\ |
874 | and it is the program executed when you use the `run' command.\n\ | |
875 | If FILE cannot be found as specified, your execution directory path\n\ | |
876 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 877 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 878 | set_cmd_completer (c, filename_completer); |
c906108c SS |
879 | } |
880 | ||
1a966eab AC |
881 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
882 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
883 | If FILE cannot be found as specified, your execution directory path\n\ |
884 | is searched for a command of that name.\n\ | |
1a966eab | 885 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 886 | set_cmd_completer (c, filename_completer); |
c906108c | 887 | |
1bedd215 AC |
888 | add_com ("section", class_files, set_section_command, _("\ |
889 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
890 | This can be used if the exec file does not contain section addresses,\n\ |
891 | (such as in the a.out format), or when the addresses specified in the\n\ | |
892 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 893 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 894 | |
5bf193a2 AC |
895 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
896 | Set writing into executable and core files."), _("\ | |
897 | Show writing into executable and core files."), NULL, | |
898 | NULL, | |
920d2a44 | 899 | show_write_files, |
5bf193a2 | 900 | &setlist, &showlist); |
c5aa993b | 901 | |
9852c492 | 902 | add_target_with_completer (&exec_ops, filename_completer); |
c906108c | 903 | } |
be4d1333 MS |
904 | |
905 | static char * | |
fc6691b2 | 906 | exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 | 907 | { |
8a3fe4f8 | 908 | error (_("Can't create a corefile")); |
be4d1333 | 909 | } |